AUSTIN — Texas quarterback David Ash is out indefinitely after suffering the third documented concussion of his college career during a win against North Texas on Saturday, Texas coach Charlie Strong said Monday.

Ash will miss at least this weekend’s game against Brigham Young and be evaluated weekly, Strong said.

He said Ash’s injury occurred early in the first quarter of the 38-7 win, but that Ash did not begin to show concussion symptoms — headaches and dizziness — until later in the evening.

But he showed no symptoms during the game, Strong said. Ash would throw for one touchdown and run for another after taking the hit.

“I don’t know if he’s hiding it, but he’s a competitor,” Strong said. “We have to be smart as coaches.”

The Texas roster continues to thin this week. Just hours after wide receivers Kendall Sanders and Montrel Meander were indefinitely suspended as a result of a sexual assault charge, reports began surfacing that defensive back Chevoski Collins and running back Jalen Overstreet had been dismissed for a violation of team rules.

On Friday, the Austin American-Statesman confirmed not only that Collins and Overstreet were dismissed, but that senior running back Joe Bergeron was also dismissed for a team rules violation.

Texas coach Charlie Strong said earlier in the week that Bergeron was “back in the mix” after taking time away from football in the spring to focus on academics. Bergeron has totaled 20 touchdowns in the last two seasons, dominating as a short-yardage back in 2012 and contributing to the rotation last season.

At Big 12 media days, Texas cornerback Quandre Diggs described a “new Texas” that is taking shape under the direction of Strong’s staff. Diggs went as far to say he supported the approach of removing players who weren’t all in with the new direction.

“I want to weed guys out. That’s just me,” Diggs said via ESPN.com. “I’m an up-front person. All my teammates know me. I’m going to tell you how I feel. I’m not going to jab at anything. I’m going to take an uppercut, take the hardest swing I can take, and I’ll try to knock you out.

“I don’t sugarcoat anything just like [Strong’s coaches] don’t sugarcoat anything. That’s just how I am, how I was born, how I was raised. I love the way they’re taking the approach of getting guys out of here that don’t belong.”

Bergeron’s absence makes Johnathan Gray’s recovery even more important. Gray ran for 780 yards and four touchdowns on 159 carries before missing the season’s last four games with an achilles injury. Per colleague Jeremy Fowler, Gray has been medically cleared to resume workouts.

Update, 4:33 p.m. — Texas spokesman John Bianco said the football program is aware of the situation and gathering information. Bianco said he expects to issue a statement from coach Mack Brown after practice ends this evening.

Earlier Senior safety Christian Scott was arrested early this afternoon on a Class A misdemeanor assault with bodily injury charge. He’s being held in the Travis County Jail.

Details on the incident were not immediately available, but Scott was arrested in the 300 block of E. Yager Lane, at approximately 1 p.m.